Sounds similar to this existing feature request. It has 32 votes already: Show password strength (zxcvbn) under Password Generator and Password Fields
Since there are a number of existing feature requests on the password generator, you should probably be more specific if your feature request is different from all of them.
If your request is even slightly similar to an existing one that has a larger number of votes, it is probably better to vote for that request and discuss your recommendations there due to how voting system works.
Some other feature requests I found beyond ones that K0media listed are shown below.
For special characters:
- Customizable exclusion of characters (29 votes, Mar 2018).
Has some discussion on using KeePass’s “Exclude …” options
Link: Filter special characters in generated passwords per login - Additional character sets (10 votes, Mar 2018).
Link: Expand Pool of Special Characters Available in Password Generator - Customizable inclusion of characters (12 votes, July 2019).
Link: “Only include these symbols” field option in Password Generator - Probably duplicate request for customizing characters (10 votes, Oct 2020):
Link: https://community.bitwarden.com/t/customize-what-special-characters-are-allowed-to-use-in-the-password-generator/15013
Other requests
- Selecting more specific generation settings (0 votes, Feb 2020):
Link: https://community.bitwarden.com/t/password-generator-criteria/10653 - Multiple changes to password generator options (1 vote, Mar 2021):
Link: More Password Generator Enhancements (Comprehensive List)